There are three copies of the 1945-05-08 broadcast: Roy_Rogers_450508_Legend_Of_Pecos_
Bill.mp3, Roy_Rogers_450508_Porter_Hall_
Villain.mp3, and Roy_Rogers_490508_Pacos_
Bill.mp3. The 1948-04-20 broadcast is a Red Ryder show, not Roy Rogers. The Red Ryder show was fun also. The 1951-11-16 show is a jumbled collage with parts of the 1951-11-23 show.
There are two 1951-12-28 shows which are a duplicate pair.